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Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) |  |  |  | 3 Months Ended | 12 Months Ended
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May 08, 2022 | May 09, 2021 | Aug. 10, 2018 | Dec. 31, 2022 | Oct. 01, 2022 | Jul. 02, 2022 | Mar. 28, 2020 | Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Net book value of franchise rights acquired |  |  |  | $ 383,683,000 |  |  |  | $ 383,683,000 | $ 782,056,000 |
Net book value of goodwill |  |  |  | $ 155,998,000 |  |  |  | 155,998,000 | 157,374,000 | $ 155,617,000
Goodwill impairment | $ 0 | $ 0 |  |  |  |  |  | 3,124,000 |  |
Finite-lived intangible assets, aggregate amortization expense |  |  |  |  |  |  |  | $ 33,676,000 | $ 32,220,000 | $ 29,828,000
Discount rate |  |  |  |  |  |  |  | 9.60% | 8.50% |
Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges |  | $ 0 |  |  |  |  |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Asset Impairment Charges |  |  |  |  |  |  |  |
Assumed cumulative annual revenue growth rate |  |  |  | 2.50% | 2.50% | 2.40% |  |  |  |
Discount rate |  |  |  | 13.70% | 13.40% |  |  |  |  |
Hypothetical discount rate percentage increase |  |  |  | 0.05% |  |  |  |  |  |
Hypothetical projected Digital revenues percentage reduction |  |  |  | 1.00% |  |  |  |  |  |
Kurbo, Inc |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  | $ 1,101,000 |  |  |  |
Kurbo Health, Inc |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Net purchase price |  |  | $ 3,063,000 |  |  |  |  |  |  |
Net book value of goodwill |  |  | $ 1,101,000 |  |  |  |  |  |  |
Minimum | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Assumed Workshops + Digital revenue growth rate |  |  |  | (4.30%) | 20.20% | 23.00% |  |  |  |
Assumed operating income margin rates |  |  |  | (19.10%) | 2.30% | (3.00%) |  |  |  |
Assumed Digital revenue growth rate |  |  |  | (25.40%) | (21.50%) | (25.60%) |  |  |  |
Maximum | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Assumed Workshops + Digital revenue growth rate |  |  |  | 43.80% | 57.60% | 106.20% |  |  |  |
Assumed operating income margin rates |  |  |  | 12.20% | 8.80% | 8.80% |  |  |  |
Assumed Digital revenue growth rate |  |  |  | 24.40% | 1.60% | 16.10% |  |  |  |
Other Units of Account | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges | $ 0 |  |  |  |  |  |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] | Asset Impairment Charges |  |  |  |  |  |  |  |  |
Percentage of franchise rights acquired |  |  |  |  |  | 2.20% |  |  |  |
Other Units of Account | Minimum | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value in excess of carrying amount | 100.00% |  |  |  |  |  |  |  |  |
Brazil |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  | $ 3,665,000 |  |  |
All Reporting Units Except for Republic of Ireland |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of goodwill held |  |  |  |  |  | 97.30% |  |  |  |
All Reporting Units Except for Republic of Ireland | Goodwill | Minimum |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value equal to carrying amount | 35.00% |  |  |  |  |  |  |  |  |
Republic of Ireland |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value in excess of carrying amount | 14.00% |  |  |  |  |  |  |  |  |
Percentage of goodwill held |  |  |  |  |  | 2.70% |  |  |  |
Net book value of goodwill |  |  |  |  |  | $ 4,265,000 |  |  |  |
Goodwill impairment |  |  |  | $ 2,023,000 |  |  |  |  |  |
Australia | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges |  |  |  | $ 1,872,000 |  |  |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Asset Impairment Charges |  |  |  |  |  |
Percentage of franchise rights acquired |  |  |  | 1.10% |  |  |  | 1.10% | 0.80% |
Net book value of franchise rights acquired |  |  |  | $ 4,232,000 |  |  |  | $ 4,232,000 | $ 6,529,000 |
Australia | Hypothetical Discount Rate Percentage Increase | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 5.60% |  |  |  |  |  |
Australia | Hypothetical Projected Digital Revenue Percentage Reduction | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 2.90% |  |  |  |  |  |
United States |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Net book value of goodwill |  |  |  | $ 104,019,000 |  |  |  | $ 104,019,000 | $ 105,121,000 |
United States | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges |  |  |  | $ 25,739,000 | $ 298,291,000 |  |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Asset Impairment Charges | Asset Impairment Charges |  |  |  |  |
Percentage of estimated fair value in excess of carrying amount | 15.00% |  |  |  |  |  |  |  |  |
Percentage of franchise rights acquired |  |  |  | 97.60% | 91.50% | 92.70% |  | 97.60% | 89.30% |
Net book value of franchise rights acquired |  |  |  | $ 374,353,000 | $ 400,092,000 | $ 698,383,000 |  | $ 374,353,000 | $ 698,383,000 |
United States | Hypothetical Discount Rate Percentage Increase | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 6.60% |  |  |  |  |  |
United States | Hypothetical Projected Digital Revenue Percentage Reduction | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 1.00% |  |  |  |  |  |
United Kingdom | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges |  |  |  | $ 8,275,000 |  |  |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Asset Impairment Charges |  |  |  |  |  |
Percentage of franchise rights acquired |  |  |  | 0.70% |  |  |  | 0.70% | 1.60% |
Net book value of franchise rights acquired |  |  |  | $ 2,666,000 |  |  |  | $ 2,666,000 | $ 12,187,000 |
United Kingdom | Hypothetical Discount Rate Percentage Increase | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 8.90% |  |  |  |  |  |
United Kingdom | Hypothetical Projected Digital Revenue Percentage Reduction | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 6.80% |  |  |  |  |  |
Canada |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Net book value of goodwill |  |  |  | $ 39,547,000 |  |  |  | $ 39,547,000 | $ 42,409,000 |
Canada | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges |  |  |  | $ 19,657,000 | $ 13,312,000 | $ 24,485,000 |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Asset Impairment Charges | Asset Impairment Charges | Asset Impairment Charges |  |  |  |
Percentage of franchise rights acquired |  |  |  |  | 4.40% | 4.60% |  |  | 7.70% |
Net book value of franchise rights acquired |  |  |  |  | $ 19,342,000 | $ 34,556,000 |  |  | $ 60,117,000 |
New Zealand | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets, impairment charges |  |  |  | $ 0 | $ 1,138,000 | $ 834,000 |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Asset Impairment Charges | Asset Impairment Charges | Asset Impairment Charges |  |  |  |
Percentage of franchise rights acquired |  |  |  | 0.60% | 0.50% | 0.50% |  | 0.60% | 0.60% |
Net book value of franchise rights acquired |  |  |  | $ 2,432,000 | $ 2,141,000 | $ 3,574,000 |  | $ 2,432,000 | $ 4,840,000 |
New Zealand | Hypothetical Discount Rate Percentage Increase | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 5.30% |  |  |  |  |  |
New Zealand | Hypothetical Projected Digital Revenue Percentage Reduction | Franchise Rights Acquired |  |  |  |  |  |  |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of estimated fair value reduction |  |  |  | 1.00% |  |  |  |  |  |

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